天然产物研究与开发 ›› 2014, Vol. 26 ›› Issue (9): 1357-1360.

• 研究论文 • 上一篇    下一篇

一株牛蒡共生真菌杀虫活性的研究

李昉*,杜方鹏   

  1. 青岛科技大学化学与分子工程学院,青岛 266042
  • 出版日期:2014-09-30 发布日期:2014-11-02

Study on Insecticidal Activity of a Symbiotic Fungi from Arctium lappa L.

LI Fang*, DU Fang-peng   

  1. College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China
  • Online:2014-09-30 Published:2014-11-02

摘要: 为寻找新型微生物农药,对分离自牛蒡茎的一株共生真菌NJ-1菌丝体和发酵液粗提物分别进行杀虫活性研究。采用组织块法从健康牛蒡植物的茎中进行菌株分离;采用卤虫作为生物模型进行杀虫活性物质的筛选。通过PCR扩增鉴定真菌NJ-1为四孢脉孢菌(Neurospora tetrasperma);该真菌菌丝体和发酵液粗提物对卤虫的半数致死量(LD50)分别是0.84 mg/mL和0.27 mg/mL;经与三种常见化学农药氯氰菊酯、敌敌畏和氧乐果对卤虫半数致死量对比,该真菌发酵液粗提物LD50是对照组活性最好的敌敌畏LD50的2.3倍。牛蒡共生真菌NJ-1粗提代谢物具有很强的杀虫活性,可为新型微生物农药开发提供生物来源。

关键词: 牛蒡, 共生真菌, 四孢脉孢菌, 卤虫, 半数致死量

Abstract: To develop a new microbial pesticide,a symbiotic fungi named as NJ-1 was isolated from the stem of Arctium lappa L.and the extracts from the mycelium and the fermentation broth were studied in terms of insecticidal activity.The fungus was isolated from stems of health A.lappa, and the crude extracts were obtained by purification and fermentation.Brine shrimp was used as a biological model to screen substance with the insecticidal activity. NJ-1 was identified to be Neurospora tetrasperma. The median lethal dose LD50 of the extracts from the mycelium and the fermentation broth were 0.84 mg/mL and 0.27 mg/mL, respectively. The activity of the extract from NJ-1 fermentation broth was 1.3 times greater than DDVP when compared with three kinds of chemical pesticides (cypermethrin,DDVP and omethoate). NJ-1 had significant insecticidal activity to brine shrimp, which may provide a new biological resource to explore new microbial insecticide.

Key words: Arctium lappa L.;symbiotic fungi, Neurospora tetrasperma, brine shrimp;LD50

中图分类号: 

Q939